Union Health Secretary Rajesh Bhushan has written to Maharashtra, Kerala, Chhattisgarh and West Bengal, urging them to take steps to curb the spike in coronavirus cases.

These states are reporting an upsurge in the number of daily new cases in the recent days, and comprise 59 per cent of the total active cases in the country. About 28.61 per cent cases are in Kerala, followed by 22.79 per cent in Maharashtra, 3.99 per cent in Chhattisgarh and 3.89 per cent in West Bengal.